Abstract
In the previous paper, we clarified that in the frame structure lateral deformation of the beams connected to columns is restricted by those columns, and it is possible to reduce these buckling length Then we assume that boundary conditon of these beam is warping fixed. But in the case of beams connected to H-shaped column, the torsional rigidity of beam-to column joint is small, so we can hardly expect effect of warping restraint at the edge. In this paper, we investigate the lateral buckling length of the beams prevented warping deformation by beam-to column joints